WO2023181615A1

WO2023181615A1 - Rotary electric machine

Info

Publication number: WO2023181615A1
Application number: PCT/JP2023/002026
Authority: WO
Inventors: 貴彦疋田; 幸司森
Original assignee: 株式会社デンソートリム
Priority date: 2022-03-24
Filing date: 2023-01-24
Publication date: 2023-09-28
Also published as: JP7328588B1; JP2023142230A

Abstract

In the present invention, a coil is formed by winding a conductive wire around teeth of a stator, and a control device controls the energization of the coil to the k phase. The coil is divided by n into n systems, and the n divided coils are arranged continuously over an angle range obtained by dividing 360 degrees by n. In the conductive wire, a coil in a phase that is the same as the number obtained by dividing the number of teeth x by n and the k phase of the coil is wound so as to be continuous in the circumferential direction. A lead and the winding-starting end of the coil of the conducting wire are linked by a winding-starting leader line, and the lead and the winding-finishing end of the coil of the conducting wire are linked by a winding-finishing leader line. The portion that connects with the lead are secured to the stator by clips. The clips, of which there are n in number, are positioned approximately in the middle of the dividing lines obtained from the n divisions.

Description

rotating electric machine

Cross-reference of related applications

This application is based on Patent Application No. 2022-49009 filed in Japan on March 24, 2022, and the content of the underlying application is incorporated by reference in its entirety.

The description in this specification relates to a rotating electric machine, and is useful for use as a generator or starter for a two-wheeled vehicle, for example.

In recent years, with the increase in demand for electric power in various vehicles, efforts have been made to improve the output of vehicle generators. Along with this increase in output, the temperature of the coil wound around the stator of the rotating electric machine is also increasing. As a measure to prevent the temperature of the coil from rising, it may be possible to provide multiple current paths to the coil. Patent Document 1 describes a winding structure that can selectively change output characteristics.

Patent Publication No. 2010-115041

Here, if there is one system of coils, the windings forming the coil will continue from the coil at the beginning of winding to the coil at the end of winding by going around one circumference in the circumferential direction. That is, if there is one system of coils, the winding start position and winding end position of the conducting wire forming the coil can be set close to each other. On the other hand, if multiple systems (n systems) of coils are arranged consecutively within an angle range of 360 degrees divided by n, the winding start position and winding end position of the conducting wire forming the coil will be separated. Therefore, a long lead wire is disposed on the stator up to the connection portion between the conducting wire and the lead wire. However, in the rotating electric machine described in Patent Document 1, the structure of this lead wire has not been considered.

The present disclosure aims to increase the vibration resistance of the lead wire and improve the heat dissipation of the coil lead wire to suppress temperature rise by devising the arrangement of the lead wire and the lead wire.

A first aspect of the present disclosure includes a rotor having a plurality of permanent magnets arranged in the circumferential direction and rotating together with a shaft, a plurality of teeth and a plurality of coils arranged in the teeth, and a radially outer end of the teeth. This is a rotating electrical machine that includes magnets and a stator facing each other. A first stator of the present disclosure includes a disk-shaped base portion fixed to a fixed portion, x number of teeth portions extending radially outward from the base portion, and winding conductive wires arranged on the teeth portions. It is equipped with x number of coils.

A first aspect of the present disclosure is a lead wire electrically connected to a conducting wire, a winding start lead wire and a winding end lead wire that connect the lead wire to a winding start end of a coil and a winding end end of the coil of the conductor; It includes a clip that fixes the connection portion between the winding start lead wire and the winding end lead wire and the lead wire to the stator, and a control device that electrically connects to the lead wire and controls input and output power of the coil.

The first aspect of the present disclosure is that the control device controls the energization of the coil to the k phase, the coil is divided into n systems, and n is 2 or more and less than or equal to the number obtained by dividing the x number of the teeth part by the k phase of the coil. is a natural number, and the n-divided coils are continuously arranged within an angular range of 360 degrees divided by n. Then, the conductor is wound continuously in the circumferential direction with coils of the same phase, the number of which is obtained by dividing the x number of the teeth by n and the k phase of the coil, and the number of clips is n, and the clips connect the coils. It is fixed to the base of the stator near the coil located approximately in the middle of the n-dividing line. The winding start lead line and the winding end lead line are wired so as to thread between the tooth parts, and converge at a convergence part located near the position where the clip is fixed.

In the first aspect of the present disclosure, a clip for fixing a connecting portion between a lead wire and a lead wire to the stator is fixed to a base portion of the stator near the coil located approximately in the middle of a division line that divides the coil into n. Therefore, the length of the lead line can be shortened. Therefore, in the first aspect of the present disclosure, an increase in the mass of the lead wire is also suppressed, and deterioration of the vibration resistance of the lead wire is also suppressed.

In the first aspect of the present disclosure, it is assumed that the winding start lead line and the winding end lead line are wired so as to thread between the teeth parts, and converge at a convergence part located near the position where the clip is fixed. There is. Therefore, the winding start wire and the winding end lead wire are concentrated particularly at the convergence part, which causes deterioration of heat dissipation. On the other hand, since the first embodiment of the present disclosure uses n number of clips, it is possible to reduce the number of lead lines bound by the clips. As a result, the number of lead wires covering the coil is reduced, the flow of cooling air around the coil becomes smoother, and heat dissipation performance deteriorates due to the arrangement of the winding start lead wire and winding end lead wire, including the convergence part. We have been able to suppress these factors. Thereby, the rise in temperature of the coil can also be suppressed. In addition, the number of lead wires bundled with clips can also be reduced. Therefore, deterioration in coil heat dissipation due to lead wiring can also be suppressed.

A second aspect of the present disclosure is that the base portion of the stator is fixed to the fixed portion through the fixing holes, and the fixing holes are arranged so as to be approximately symmetrical with respect to a dividing line that divides the coil into n. . By arranging the stator fixing holes and the clips symmetrically with respect to the dividing line, it is possible to make the vibration behavior of the n-system lead wires and the lead wires the same. Thereby, the vibration resistance of the lead wire and the lead wire can be improved. That is, if the system is not symmetrical, a relatively large vibration stress will not be applied to any of the first to nth systems. By arranging them approximately symmetrically, the vibration stress of the system to which a large vibration stress was applied is reduced. As a result, the vibration resistance of the lead wire and the lead wire is improved. Note that the present disclosure does not require strict symmetry, but rather approximate symmetry. The degree of freedom in arrangement is allowed within a range that does not adversely affect the balance, taking into account the assembly position, etc.

The third aspect of the present disclosure is that the control device controls the input and output power of the coil to three phases, n is an even number, and the control device controls the winding direction of the coil belonging to the odd-numbered system and the coil belonging to the even-numbered system. By setting the directions in opposite directions, the power supply is controlled so that the input and output powers are in opposite phases. As a result, vibrations of the rotating electric machine itself due to the induced electromotive force of the coil can be suppressed, and vibration resistance is further improved.

A rotating electric machine according to another aspect of the present disclosure includes a rotor having a permanent magnet that provides a plurality of magnetic poles arranged along the circumferential direction, a disk-shaped base portion, and a rotor that extends radially outward from the base portion. and includes a plurality of teeth portions whose radially outer ends face the permanent magnets, and a plurality of coils arranged on each of the plurality of teeth portions and formed by winding a conducting wire. A stator, a plurality of winding start lead wires, and a plurality of winding end lead wires extending along the stator from the winding start end of the coil and the winding end end of the coil. , includes a plurality of lead wires electrically connected at the plurality of coupling parts and a plurality of clips fixing the plurality of coupling parts to the stator, the number of poles of the plurality of teeth parts is x, and the plurality of coils is divided into a plurality of systems by the number of divisions n, and the plurality of coils belonging to each system provide windings with the number of phases k, the number of divisions n is 2 or more, and the number of poles x is a natural number equal to or less than the number divided by the number of phases k, and the multiple coils belonging to each system are arranged consecutively within the range of angles obtained by dividing 360 degrees by the number of divisions n, and the number of poles x The number of coils divided by the number of divisions n and the number of phases k is wound in each system by a series of conducting wires that are continuous along the circumferential direction, and the number of multiple clips is equal to the number of divisions. The plurality of clips are fixed to the base portion in the vicinity of the coil located approximately in the middle of the dividing line that divides the plurality of coils, and the winding start lead wire and the winding end lead wire are The wires are wired so as to weave between the teeth of the clips, and converge at a convergence section located near the position where the plurality of clips are fixed.

In the rotating electric machine according to another aspect of the present disclosure, the base portion has a plurality of fixing holes for fixing to the fixed portion that is the fixing target, and the fixing holes are approximately line symmetrical with respect to the dividing line. It is arranged like this.

In the rotating electric machine according to another aspect of the present disclosure, the number of phases k is 3, the number of divisions n is an even number, and the plurality of coils belonging to the odd-numbered system and the plurality of coils belonging to the even-numbered system are , are wound so that the winding directions are opposite to each other.

The rotating electric machine according to another aspect of the present disclosure further includes a control device that is electrically connected to the plurality of lead wires and controls input and output power of the plurality of coils to an alternating current with a number of phases k. Control is performed so that the input/output power of the plurality of coils belonging to the odd-numbered systems and the input/output power of the plurality of coils belonging to the even-numbered systems are in opposite phases to each other.

FIG. 1 is a perspective view of a rotating electrical machine combined with a crankshaft and an engine cover. FIG. 2 is a perspective view showing the rotor and stator. FIG. 3 is a front view showing the stator and sensor case. FIG. 4 is a perspective view showing the stator and the sensor case. FIG. 5 is a wiring diagram showing a coil, a lead wire, and a lead wire. FIG. 6 is a wiring diagram showing a first system of coils, lead wires, and lead wires. FIG. 7 is a wiring diagram showing the coil, lead wire, and lead wire of the second system. FIG. 8 is a wiring diagram showing the coils, lead wires, lead wires, and control devices of the first system and the second system. FIG. 9 is a front view showing the coil and lead wire. FIG. 10 is a front view showing the arrangement of stator fixing holes and clips. FIG. 11 is a front view showing another example of the arrangement of stator fixing holes and clips. FIG. 12 is a front view showing another example of the arrangement of stator fixing holes and clips. FIG. 13 is a front view showing another example of the arrangement of stator fixing holes and clips. FIG. 14 is a sectional view of the rotary electric machine combined with the crankshaft and the engine cover. FIG. 15 is a wiring diagram showing the coils and lead wires of the first and second systems of the reference example. FIG. 16 is a wiring diagram showing expanded lead lines similar to those in FIG. 5. FIG. 17 is a wiring diagram showing a convergence portion of the coils and lead wires of the first system and the second system of the reference example. FIG. 18 is a wiring diagram showing a convergence portion of the lead lines similar to that in FIG. 5. FIG. 19 is a wiring diagram showing a state in which the coils of the first system and the second system are in the same phase. FIG. 20 is a wiring diagram showing a state in which the coils of the first system and the second system are in opposite phases. FIG. 21 is a diagram illustrating the output voltage in a state where the coils of the first system and the second system are in the same phase. FIG. 22 is a diagram illustrating the output voltage in a state where the coils of the first system and the second system are in opposite phases.

Hereinafter, an example of the present disclosure will be described based on the drawings. The term "division" in this disclosure does not only mean the act of dividing one aggregate into two or more individual elements. The term "dividing" in this disclosure may mean the act of determining boundaries between two or more individual elements in one aggregate. A boundary is not a feature that physically isolates an individual element. A boundary is a feature that allows a first individual element to be distinguished from a second individual element. In other words, the word "divide" also refers to the act of separating two or more individual elements from one aggregate by boundaries. Further, the "x number" of the teeth means the number of poles x of the teeth. The word "division" may also be appropriate when two or more individual elements are collected to form a single aggregate. Moreover, "k phase" means the number k of phases of multiphase AC power. "n system" means the number n of divisions of the system, and "n division" means the number n of divisions. FIG. 1 is a perspective view of the rotating electric machine 1 combined with a crankshaft 100 and an engine cover 200. The crank web 101 rotates the crankshaft 100 by receiving the movement of a piston (not shown) reciprocating within a cylinder (not shown) via a connecting rod (not shown). The crankshaft 100 is made of iron and has a diameter of about 20 mm, and is rotatably supported by a cylinder block 110 (shown in FIG. 14).

The engine cover 200 covers the opening 111 of the cylinder block 110 and is bolted to the cylinder block 110 through the bolt holes 201. The engine cover 200 is made of die-cast aluminum or aluminum alloy, and has a wall thickness of about 4 mm. Since the engine cover 200 is continuous with the opening 111 of the cylinder block 110, the internal environment is similar to that of the cylinder block 110.

A rotor 300 of the rotating electrical machine 1 is fixed to the crankshaft 100 at a base 301 (shown in FIGS. 2 and 14). Therefore, the rotor 300 rotates together with the crankshaft 100. The rotor 300 is made of iron material and includes a disk portion 302 extending radially outward from a base portion 301 that engages with the crankshaft 100, and a cylindrical portion 303 formed at a radially outer portion of the disk portion 302. There is. As shown in FIG. 2, twelve permanent magnets 304 are arranged in a line in the circumferential direction inside the cylindrical portion 303. The thickness of the permanent magnet 304 is approximately 4 to 5 mm. Note that the number of magnetic poles of the permanent magnet 304 is not limited to 12 poles, and can be set as appropriate, such as 20 poles or 24 poles, depending on the required performance.

A stator 400 is arranged inside the rotor 300, as shown in FIGS. 2 and 14. FIG. 2 is a perspective view of stator 400 viewed from the engine cover 200 side. The stator 400 is formed by laminating a plurality of magnetic steel plates and has a base portion 401 that is attached to the engine cover 200. In this example, the engine cover 200 serves as the fixed part. The stator 400 includes a plurality of teeth portions 402 that extend radially outward from the base portion 401 and are integrally formed with the base portion 401 . In the example of FIG. 3, the number of teeth portions 402 is 18, but the number of teeth portions 402 can be changed as appropriate depending on the required performance and the number of magnetic poles. Further, FIG. 3 shows the tip of the tooth portion 402 and the coil 404 wound around the tooth portion 402. The outer diameter of the stator 400 is about 110 to 130 mm, and the inner diameter of the rotor 300 is therefore large enough to form a minute gap between the outer diameter of the stator 400 and the permanent magnets 304.

Three fixing holes 403 are formed through the base portion 401 for fixing the stator 400 to the engine cover 200 with bolts. The base portion 401 also has one sensor case bolt through hole for fixing a sensor case 500, which will be described later, to the stator 400.

The teeth portion 402 is electrically insulated with an insulator made of insulating resin such as polyamide, and a coil 404 made of copper wire or aluminum wire is wound on the insulator. FIG. 3 is a front view showing the stator 400 and the sensor case 500 with the rotor 300 removed from FIG. FIG. 4 is a perspective view showing the stator 400 and the sensor case 500 from the opposite direction from FIG.

As shown in FIG. 3, a gap 405 is formed between adjacent coils 404, and the gap 405 becomes wider toward the outside in the radial direction. Of course, the space factor may be increased by winding the coil 404 so that the gap 405 is constant. Further, as shown in FIG. 4, a sensor case 500 is arranged in this gap 405. The sensor case 500 is molded from a resin such as polyamide reinforced with glass fibers.

The first to fourth Hall sensors 502 to 505 have a size of about 2 mm x 3 mm, and are molded with resin together with a power supply line, a ground line, and a sensor output line. Note that the first to fourth Hall sensors 502 to 505 themselves are not shown in FIG. Reference numerals 502 to 505 in FIG. 4 indicate parts of the sensor case 500 where the first to fourth Hall sensors are located.

The first Hall sensor 502 detects a reference position for ignition control. The first Hall sensor 502 is arranged at a different position in the axial direction of the crankshaft 100 than the other second to

fourth Hall sensors

503, 504, and 505. More specifically, the first Hall sensor 502 is arranged at the center position in the axial direction of the gap 405 between the teeth portions 402. On the other hand, the second to

fourth Hall sensors

503, 504, and 505 are arranged on the engine cover 200 side of the gap 405.

In the arrangement position of the first Hall sensor 502, there is no reversal from the north pole to the south pole at the reference position, and the north pole is continuous between the three permanent magnets 304. By detecting the succession of these three north poles, the reference position can be detected. Since the rotor 300 rotates integrally with the crankshaft 100, the reference position indicates the position of the crankshaft 100 in the rotational direction. By utilizing the fact that the crankshaft 100 is at the reference position and the switching of the magnetic poles of other Hall sensors, the ignition timing of a spark plug (not shown) disposed in the cylinder of the engine is controlled.

The second to

fourth Hall sensors

503, 504, and 505 face the permanent magnet 304 in which the north pole and the south pole are alternately magnetized, and detect the position where the north pole and the south pole alternately change. The respective detection positions of the second to

fourth Hall sensors

503, 504, and 505 correspond to the energization timing of the three phases (V phase, W phase, and U phase), and the rotating electric machine 1 is activated according to the detection positions. When the motor is used as a starter, the supply of voltage to the coils 404 corresponding to the U-phase, V-phase, and W-phase is controlled. Also when the rotating electric machine 1 is used as a generator, it is used as a timing signal for controlling the currents from the coils 404 corresponding to the U-phase, V-phase, and W-phase.

In the present disclosure, the three-phase coil is separated into two systems. The three-phase coil on the right side of the dividing line A shown in FIG. 5 forms a three-phase electric circuit consisting of three-phase windings of U phase, V phase, and W phase. Similarly, the three-phase coil on the left side also has three-phase electric circuits of X phase, Y phase, and Z phase. Two systems of three-phase coils consisting of these different electric circuits are arranged in left and right divisions. In other words, in the present disclosure, three-phase coils separated into two systems are arranged consecutively, and a line separating the two systems of three-phase coils is shown as a dividing line A. That is, each separated three-phase coil does not cross the dividing line A into the area of another three-phase coil.

In addition, in FIG. 5, the wiring between the conducting wire 450 of the coil 404, the winding

start lead wires

451, 452, 453 of the three-phase coil, and the winding

end lead wires

455, 456, 457 of the three-phase coil is shown in a simplified manner. The conducting wire 450 of the coil 404, the winding

start lead wires

451, 452, 453, and the winding

end lead wires

455, 456, 457 are continuous wires, and as described above, are made of copper or aluminum.

The three-phase coil winding

start lead wires

451, 452, 453 and the three-phase coil winding

end lead wires

455, 456, 457 are connected to the first to third

lead wires

460, 461, 462. The first to third

lead wires

460, 461, and 462 are wires made of copper.

Reference numerals

470, 471, and 472 indicate connections between the first to third

lead wires

460, 461, and 462 to the three-phase coil winding

start wires

451, 452, and 453, and the three-phase winding

end wires

455, 456, and 457. Show part. They are respectively referred to as a first connecting portion 470, a second connecting portion 471, and a third connecting portion 472. As a result, in three-phase coils of the same system, the winding

start lead wires

451, 452, 453 and the corresponding winding

end lead wires

455, 456, 457 can be connected side by side to one

lead wire

460, 461, 462. can.

Next, the connection state between the first to third

lead wires

460, 461, 462, the winding

start lead wires

451, 452, 453 of the three-phase coil, and the conducting wire 450 of the coil 404 will be described. The first lead wire 460 is electrically connected to the winding start lead wire 451 of the U-phase coil at a first connection portion 470 . The winding start wire 451 of the U-phase coil becomes the conducting wire 450 of the coil 404 indicated as U1 in FIG. 5, and is wound around the teeth portion 402 many times. Therefore, the coil 404 has a concentrated winding structure in which the conductive wire is continuously wound many times. Although not shown in FIG. 5, the conductive wire of the coil 404 of U1 is continuous with the conductive wire 450 of the coil 404 designated as U2 in FIG. Also, the conductor of coil 404 of U2 is continuous with the conductor 450 of coil 404 designated as U3 in FIG. That is, the conducting wire 450 includes a wire that is wound around the teeth portion 402 and concentrates winding around the coil 404, and a wire that connects the coils 404 (a so-called crossover wire).

Similarly, the second lead wire 461 is electrically connected to the winding start lead wire 451 of the V-phase coil at a second connection portion 471. The winding start wire 452 of the V-phase coil becomes the conducting wire 450 of the coil 404 shown as V1, V2, and V3 in FIG. 5, and is wound around the teeth portion 402 many times to form a concentrated winding coil 404. In addition, it also serves as a conducting wire 450 that serves as a crossover wire that connects the coils 404.

The same applies to the W-phase coil. The third lead wire 462 is electrically connected to the winding start lead wire 452 of the W-phase coil at a third connection portion 472 . The winding start wire 452 of the W-phase coil becomes the conducting wire 450 of the coil 404 shown as W1, W2, and W3 in FIG.

Then, the conducting wires 450 indicated as U3, V3, and W3 continue as they are and become the winding

end wires

455, 456, and 457 of the three-phase coil. In this way, the winding

start lead wires

451, 452, 453 of the three-phase coil, the conducting wire 450 of the three-phase coil 404, and the winding

end lead wires

455, 456, 457 of the three-phase coil are each one continuous wire. It is.

A winding end lead wire 455 from the coil 404 of U3, which is the winding end of the coil 404 of the U-phase coil, is electrically connected to a second lead wire 461 at a second connection portion 471. The winding end lead wire 456 of the V-phase coil is electrically connected to a third lead wire 462 at a third connection portion 472 . The winding end lead wire 457 of the W-phase coil is electrically connected to the first lead wire 460 at the first connection portion 470 . As described above, each

lead wire

460, 461, 462 collectively connects two corresponding winding

start lead wires

451, 452, 453 and winding

end lead wires

455, 456, 457.

FIG. 6 further shows the wiring with the winding

start lead wires

451, 452, 453 of the U-phase coil, V-phase coil, and W-phase coil, the conducting wire 450 of the coil 404, and the winding

end lead wires

455, 456, 457 of the U-phase coil, V-phase coil, and W-phase coil in FIG. It is shown in a simplified manner. The first lead wire 460 is connected to a winding start wire 451 of the U-phase coil and a winding end wire 457 of the W-phase coil at a first connecting portion 470 .

Further, the second lead wire 461 is connected to a winding start wire 452 of the V-phase coil and a winding end wire 455 of the U-phase coil at a second connection portion 471. Similarly, the third lead wire 462 is connected to the winding start wire 453 of the W-phase coil and the winding end wire 456 of the V-phase coil at a third connection portion 472. As shown in FIG. 6, the wiring of the three-phase coil 404 is a delta connection.

The three-phase coils (X phase, Y phase, Z phase) on the left side of the dividing line A shown in FIG. 5 are also the same as the three phase coils (U phase, V phase, W phase) on the right side. In FIG. 5, the X phase, Y phase, and Z phase correspond to the U phase, V phase, and W phase of the three-phase coil, respectively. Therefore, the coils 404 corresponding to U1, U2, and U3 are labeled with X1, X2, and X3. The same reference numerals are also given to lines corresponding to the first lead wire to the third lead wire and portions corresponding to the first connection to the third connection portion. The same applies to the winding

start lead wires

451, 452, 453 and the winding

end lead wires

455, 456, 457 of the three-phase coil. Similar to FIG. 6, FIG. 7 shows the electrical connection state of the X, Y, and Z phases in delta connection.

The first to third

lead wires

460, 461, and 462 of the three-phase coils of U-phase, V-phase, and W-phase and the three-phase coils of X-phase, Y-phase, and Z-phase are connected to the control device shown in FIG. Electrically connect to 480. As described above, when the rotating electric machine 1 is used as a motor for a starter, power is supplied to the coils 404 corresponding to the U phase, V phase, W phase, X phase, Y phase, and Z phase by input from the battery 481. The power generated is controlled by this controller 480. Thereby, the rotational direction and rotational speed of the rotating electric machine 1 are controlled. Note that since the control device performs conversion using both voltage and current, it is collectively referred to as power control.

Also, when the rotating electric machine 1 is used as a generator, the power output from the coils 404 corresponding to the U phase, V phase, W phase, X phase, Y phase, and Z phase is controlled by the control device 480. . The control device 480 converts the three-phase alternating current into direct current power and charges the battery 481.

Here, even if there are two systems of three-phase coils, each winding

start lead wire

451, 452, 453 and winding

end lead wire

455, 456, 457 are converged at one place, and the first to third connecting

portions

470, 471 , 472 is also possible. However, if they are converged at one location, all the winding

start lead lines

451, 452, 453 and winding

end lead lines

455, 456, 457 will be concentrated, as shown in FIG. In the example of FIG. 15, winding

start lead wires

451, 452, 453 and winding

end lead wires

455, 456, 457 are concentrated between the W2 phase coil 404, the U3 phase coil 404, and the V3 phase coil 404. That is, all the winding

start lead wires

451, 452, 453 and all the winding

end lead wires

455, 456, 457 are passed between a pair of adjacent coils 404, and they are concentrated at that part. Note that the concentrated winding

start lead lines

451, 452, 453 and winding

end lead lines

455, 456, 457 are bundled by a clip 490, which will be described later.

On the other hand, as shown in FIG. 18, if the two systems of winding start lead-out

lines

451, 452, 453 and winding end lead-out

lines

455, 456, 457 are divided into two, the degree of concentration is halved. In other words, there are two sets of adjacent coils 404, and between each coil 404, half of the winding

start lead wires

451, 452, 453 and half of the winding

end lead wires

455, 456, 457 can be passed, and the degree of concentration can be adjusted. will be halved. In this case, the winding

start lead wires

451, 452, 453 and the winding

end lead wires

455, 456, 457 of the three-phase coils of U phase, V phase, and W phase are bundled with the first clip 490. Then, the winding

start lead wires

451 , 452 , 453 and the winding

end lead wires

455 , 456 , 457 of the three-phase coil of the X phase, Y phase, and Z phase are bundled with the second clip 492 .

In addition, in FIGS. 5 and 16, the winding

start lead wires

451, 452, 453 and the winding

end lead wires

455, 456, 457 of the three-phase coil are simply shown, but in reality, the winding

start lead wires

451 , 452 , 453 and winding

end lead wires

455 , 456 , 457 are wired so as to thread between each coil 404 . Therefore, when attempting to converge at one location, as shown in FIG. , 457 will be concentrated. In the example of FIG. 17, a large number of winding

start lead wires

451, 452, 453 and winding

end lead wires

455, 456, 457 are wired between the W3 phase coil 404, the X1 layer coil 404, and the Y1 layer coil 404. has been done.

On the other hand, if the two winding

start lead wires

451, 452, 453 and the winding

end lead wires

455, 456, 457 are divided into two, the winding

start lead wires

451, 452, 453 and the winding end lead wires 455 between the

coils

404 , 456, 457 can be avoided. As shown in FIG. 18, even if the winding

start lead wires

451, 452, 453 and the winding

end lead wires

455, 456, 457 are wired so as to thread between the coils 404, they are concentrated between all the coils 404. does not exist.

In particular, as shown in FIG. 10, the winding

start lead lines

451, 452, 453 and the winding

end lead lines

455, 456, 457 converge at a converging part 468 located near the first clip 490 and second clip 492. There is. That is, the winding

start lead wires

451, 452, 453 and the winding

end lead wires

455, 456, 457 are in close contact with the surface of the coil 404 at the convergence portion 468, and are fixed to the coil 404 with adhesive or powder resin. The winding

start lead lines

451, 452, 453 and the winding

end lead lines

455, 456, 457 are oriented from this convergence part 468 toward the first to

third connection parts

470, 471, 472. In this way, the winding

start lead wires

451, 452, 453 and the winding

end lead wires

455, 456, 457 are fixed at the convergence part 468 and are oriented, making it easy to solder the

lead wires

460, 461, 462. It can be carried out. In addition, it becomes easy to connect the first clip 490 and the second clip 492. Note that the first to third connecting

portions

470, 471, and 472 of the two systems are located within the first clip 490 and the second clip 492, respectively.

As described above, when the winding

start lead wires

451, 452, 453 and the winding

end lead wires

455, 456, 457 of the two systems are converged to one place to form one convergence part 468, the gap between the coils 404 A large number of winding

start lead lines

451, 452, 453 and winding

end lead lines

455, 456, 457 are concentrated at 405.

The winding

start lead lines

451, 452, 453 and the winding

end lead lines

455, 456, 457 are each bonded to the coil 404 with adhesive or powder resin. When the winding start lead-out

lines

451, 452, 453 and the winding end lead-out

lines

455, 456, 457 are concentrated, the mass at that part increases, and the resistance to vibration decreases. In particular, since the rotating electric machine 1 is fixed to the engine cover 200 and used in the same environment as the engine cylinder block 110, deterioration of vibration resistance should be avoided.

In addition, since the winding

start lead wires

451, 452, 453 and the winding

end lead wires

455, 456, 457 are arranged between the coils 404, if they concentrate, they will obstruct the flow of cooling air passing between the coils 404. It turns out. The coil 404 is cooled by air in the cylinder block 110 and mist of engine oil. The winding

start lead wires

451, 452, 453 and the winding

end lead wires

455, 456, 457 are routed between the coils 404, so that the space between the coils 404 becomes narrow, creating resistance to the flow of air and engine oil.

In the present disclosure, as described above, the three phases on the right side of the dividing line A in FIG. 5 are U phase, V phase, and W phase, and the three phases on the left side are X phase, Y phase, and Z phase. The coil 404 is arranged in a divided manner. Therefore, the above problem caused by concentration of the winding

start lead lines

451, 452, 453 and winding

end lead lines

455, 456, 457 does not occur.

In the present disclosure, as shown in FIGS. 9 and 10, the first to

third connection parts

470, 471, and 472 of the U-phase, V-phase, and W-phase are gathered in one place and fixed with a first clip 490. . The three

lead wires

461, 462, and 463 are then bundled together to form a lead wire 464. Similarly, the first to

third connection parts

470, 471, 472 of the X phase, Y phase, and Z phase are gathered in one place and fixed with the second clip 492, and the three

lead wires

461, 462, 463 are bundled. This is used as a lead wiring 464. Thereby, the above-mentioned problems caused by the concentration of lead lines can be suppressed.

Note that the first clip 490 is fixed to the base portion 401 of the stator 400 with a first fixing screw 491. The first clip 490 is placed approximately in the middle of the dividing line A. That is, the first clip 490 that holds the first to third connecting

portions

470, 471, and 472 is arranged at a substantially intermediate position with respect to the dividing line A. Here, approximately the middle is the middle in the circumferential direction of a plurality of three-phase coils arranged in the circumferential direction included in one system, and in FIG. The position is around the coil 404. Thereby, the two winding

start lead lines

451, 452, 453 and the winding

end lead lines

455, 456, 457 can be arranged in a well-balanced manner.

Note that in FIG. 10, the first clip 490 and the second clip 492 are arranged at positions that are symmetrical with respect to the dividing line A. On the other hand, the first clip 490 and the second clip 492 in FIG. 9 are not symmetrical with respect to the dividing line A, but are slightly deviated from each other. The term "substantially symmetrical" in the present disclosure also includes an example as shown in FIG. In order to avoid interference with other parts when the rotating electric machine 1 is assembled to a two-wheeled vehicle, it is permissible to shift the positions of the first clip 490 and the second clip 492 to some extent.

More specifically, the first clip 490 and the second clip 492 of the present disclosure are fixed to the base portion 401 of the stator 400 near the coil 404 located approximately in the middle of the dividing line A. Therefore, first, the position of the coil 404 located approximately in the middle of the dividing line A will be explained. The coil 404 located approximately in the middle of the dividing line A refers to the coil 404 at the symmetrical position and the coil 404 adjacent to the coil 404 when the coil 404 is located at a symmetrical position. Moreover, when the coil 404 does not exist at the symmetrical position, the coil 404 closest to the symmetrical position and the coil 404 second closest to the symmetrical position are indicated.

And, the vicinity of the coil 404 located approximately in the middle of the dividing line means that the first clip 490 and the second clip 492 are fixed near the coil 404 specified in this way. Nearby includes positions up to about 5 degrees in the vicinity.

The above has been explained using the first to

third connection parts

470, 471, and 472 of the U-phase coil, V-phase coil, and W-phase coil, but the first to third connection parts of the X-phase coil, Y-phase coil, and Z-phase coil The same applies to

sections

470, 471, and 472. The first to third connecting

portions

470, 471, and 472 of the X-phase coil, Y-phase coil, and Z-phase coil are fixed to the base portion 401 of the stator 400 with second clips 492. A second fixing screw 493 is used for fixing.

Therefore, as shown in FIGS. 9 and 10, the first to

third connection parts

470, 471, 472 of the U-phase coil, V-phase coil, and W-phase coil and the The first to third connecting

portions

470, 471, and 472 are arranged substantially symmetrically on both sides of the dividing line A. This also applies to the relationship between the first clip 490, the first fixing screw 491, the second clip 492, and the second fixing screw 493. Since the positions are substantially symmetrical across the dividing line A, the mass of the lead wiring 464 can be supported on the left and right sides in a well-balanced manner. Note that the length of the lead wiring 464 is approximately 50 to 100 centimeters. The end of the lead wire 464 is a connector 465 connected to a control device 480.

As described above, three fixing holes 403 for bolting the stator 400 to the engine cover 200 are formed in the base portion 401. In particular, in the present disclosure, these three fixing holes 403 are also arranged substantially symmetrically with respect to the dividing line A. Therefore, stator 400 including

lead wires

460, 461, and 462 can be fixed to engine cover 200 in a well-balanced manner. Engine vibrations are transmitted from the cylinder block 110 to the rotating electric machine 1 via the engine cover 200. More specifically, the vibration is transmitted to the rotating electrical machine 1 via the fixing hole 403 of the base portion 401 of the stator 400. Therefore, it is desirable that the fixing hole 403 be substantially symmetrical with respect to the dividing line A, since this allows the symmetry of the first clip 490 and the second clip 492 to be maintained in the vibration system from the engine. That is, by arranging the fixing hole 403, the first clip 490, and the second clip 492 substantially symmetrically with respect to the dividing line A, the winding start lead-out

lines

451, 452 are arranged in the first system and the second system. , 453 and the end-of-winding lead-out

lines

455, 456, 457, the first to third connecting

portions

470, 471, 472, and the first clip 490 and the second clip 492. can.

In particular, in this example, the fixing screw 491 that fixes the first clip 490 and the fixing screw 493 that fixes the second clip 492 are both located near the fixing hole 403 (about 30 degrees). The vibrations of the stator 400, including resonance, become larger as the distance from the fixing hole 403 increases. In this example, by being located near the fixing hole 403, the vibration resistance of the first clip 490 and second clip 492 portions can be improved.

Additionally, in this example, the lead wires 464 from the first clip 490 and the second clip 492 are drawn out in the same direction. Therefore, the three

lead wires

461, 462, 463 and the first to third connecting

portions

470, 471, 472 can be soldered from the same direction, improving work efficiency. This also applies to the work of assembling the connector 465 to the control device 480 or to a mating connector extending from the control device 480.

Furthermore, in this example, by using two systems, vibrations caused by the rotating electric machine 1 itself are also reduced. For example, as shown in FIG. 19, it is also possible to wind the conducting wires 450 of two systems of three-phase coils in the same phase by setting the winding directions of the concentrated windings in the same direction (clockwise in FIG. 19). In this case, the two systems of three-phase coils have the same output phase. Therefore, as shown in FIG. 21, induced electromotive force is generated in the coil 404 at the same time and in the same vector regardless of whether it is a delta connection or a star connection. That is, one system (U phase, V phase, W phase) and the other system (X phase, Y phase, Z phase) are in the same phase, and the output voltage is not symmetrical at any timing. In the star connection, the winding

start lead wires

451, 452, 453 and the winding

end lead wires

455, 456, 457 are electrically connected to one corresponding lead wire.

On the other hand, as shown in FIG. 20, when the conducting wires 450 of the two systems of three-phase coils are wound in opposite phases, the two systems of three-phase coils have output phases that are opposite to each other. That is, in Fig. 20, the first system of U-phase coil, V-phase coil, and W-phase coil is concentratedly wound clockwise, and the second system of X-phase coil, Y-phase coil, and Z-phase coil is concentratedly wound counterclockwise. are doing. In this way, when the winding directions of the concentrated windings are different from each other, the output phases are opposite. Therefore, as shown in FIG. 22, the first system (U phase, V phase, W phase) and the second system (X phase, Y phase, Z phase) are out of phase by 180 degrees. As a result, there is symmetry in the output voltage regardless of the timing. The symmetry of the output voltage is the same when the rotating electric machine 1 is used as a generator, but it is also the same when it is used as a starter. When used as a starter, there is symmetry in the input voltage, and there is symmetry when used as both a generator and a starter. As a result, vibrations having opposite phases are generated in the stator 400, so that the vibrations can cancel each other out. As a result, it is possible to suppress the stator 400 from vibrating due to the excitation of the coil 404, and it is also possible to suppress the generation of abnormal noise called magnetostrictive noise due to the vibration of the stator 400. The same thing is true of the example of FIG. 21 whether the winding of the coil 404 is a delta connection or a star connection.

In this example, based on the above, two systems of three-phase coils are arranged so that they have opposite phases. In addition, in FIGS. 19 and 20, only the conducting wire 450 is shown, and the winding start drawn out

lines

451, 452, 453 and the winding end drawn out

lines

455, 456, 457 are not shown. , 452, 453 and the winding

end lead lines

455, 456, 457 are continuous lines as described above.

Note that the number of fixing holes 403 is not limited to three. FIG. 11 shows an example in which fixing holes 403 are provided at four locations. In the example of FIG. 11 as well, the fixing holes 403 are also arranged substantially symmetrically with respect to the dividing line A. Even with this arrangement, the stator 400 can be fixed to the engine cover in a well-balanced manner.

FIG. 12 shows an example in which there are five fixing holes 403, but even in this arrangement, the fixing holes 403 are arranged approximately symmetrically with respect to the dividing line A. Therefore, even with this arrangement, the stator 400 can be fixed to the engine cover in a well-balanced manner.

Furthermore, in the above example, the coil 404 is divided into two systems, but it is also possible to divide it into three or more systems. FIG. 13 shows an example in which the three-phase coil 404 is divided into three systems. In this example, the first to third connecting

parts

470, 471, and 472 of the third system are fixed to the base part 401 of the stator 400 with a third clip 494 and a third fixing screw 495. In the example of FIG. 13, there are three fixing holes 403, and the arrangement of the fixing holes 403 is approximately symmetrical with respect to the center point of the dividing line A. The arrangement of the fixing holes 403 also allows the three systems of wiring (first clip 40, second clip 492, third clip 494, etc.) to be arranged in a well-balanced manner. Therefore, in the present disclosure, line symmetry with respect to the dividing line A means, when there are three or more dividing lines, point symmetry with respect to the center point where the dividing lines A intersect.

In the above example, the coil 404 is wound in three phases, but it is also possible to change the number of phases. The present disclosure may be used for a single-phase or a five-phase rotating electric machine 1. Further, in the above example, the three-phase winding

start lead wires

451, 452, 453, the conducting wire 450 of the coil 404, and the winding

end lead wires

455, 456, 457 were made into one continuous wire. This is a suitable example because the wiring workability is good. However, the wiring does not necessarily have to be continuous. A coil 404 may be formed by winding around the teeth portion 402, and a wire between the coils 404 may be electrically connected using another conducting wire 450. The three-phase winding

start lead wires

451, 452, 453 and the conducting wire 450 of the coil 404 may be electrically connected as separate wires. Similarly, the conducting wire 450 and the end-of-winding lead-out

lines

455, 456, and 457 may be wired separately.

Moreover, the materials and dimensions shown in the above-mentioned examples are merely examples, and can be variously changed depending on the required performance and the like.

Claims

A rotor (300) having a plurality of permanent magnets arranged in the circumferential direction and rotating together with the shaft;
A disk-shaped base part (401) fixed to a fixed part, x number of teeth parts (402) extending radially outward from this base part, and a conductive wire (450) arranged on these teeth parts and wound therein. a stator (400) comprising x number of coils (404), with radially outer ends of the teeth facing the permanent magnets;
Lead wires (460, 461, 462) electrically connected to the conductive wire;
A winding start lead wire (451, 452, 453) and a winding end lead wire (455, 456, 457) which connect this lead wire with the winding start end of the coil and the winding end end of the coil of the conductor wire. ,
a clip (490, 492, 494) for fixing a connection portion between the winding start lead wire and the winding end lead wire and the lead wire to the stator;
a control device (480) that is electrically connected to the lead wire and controls input and output power of the coil;
The control device controls energization of the coil to the k phase,
The coil is divided into n systems, where n is a natural number greater than or equal to 2 and less than or equal to the number obtained by dividing the x number of the teeth portion by the k phase of the coil, and the coil divided into n is divided into n systems. are placed continuously within the range of angles divided by
The conducting wire is formed by continuously winding the coils of the same phase in the circumferential direction, the number of which is obtained by dividing the x number of the teeth portion by n and the k phase of the coil,
the number of clips is n;
The clip is fixed to the base portion of the stator near the coil located approximately in the middle of a dividing line that divides the coil into n parts,
The winding start lead line and the winding end lead line are wired so as to weave between the teeth parts, and converge at a convergence part (468) located near the position where the clip is fixed.
the base part is fixed to the fixed part through a fixing hole,
The rotating electric machine according to claim 1, wherein the fixing hole is arranged so as to be approximately symmetrical with respect to a dividing line that divides the coil into n parts.
The control device controls input and output power of the coil to three phases,
The n is an even number,
The control device controls energization so that the coils belonging to odd-numbered systems and the coils belonging to even-numbered systems have winding directions opposite to each other so that their input and output powers are in opposite phases. The rotating electric machine according to 1 or 2.
a rotor (300) having a permanent magnet providing a plurality of circumferentially arranged magnetic poles;
A disk-shaped base portion (401), a plurality of teeth portions (402) extending radially outward from the base portion, and having radially outer ends facing the permanent magnet; a stator (400) provided with a plurality of coils (404) arranged in each of the teeth portions and formed by winding a conducting wire (450);
A plurality of winding start lead-out wires (451, 452, 453) provided by the conductive wire and extending along the stator from the winding start end of the coil and the winding end end of the coil, and , a plurality of winding end lead wires (455, 456, 457), and a plurality of lead wires (460, 461, 462) electrically connected at a plurality of connecting portions;
a plurality of clips (490, 492, 494) for fixing the plurality of connecting portions to the stator;
The number of poles of the plurality of teeth portions is x,
The plurality of coils are divided into a plurality of systems by a division number n,
The plurality of coils belonging to each system provide windings with a number of phases k,
The number of divisions n is a natural number greater than or equal to 2 and less than or equal to the number obtained by dividing the number of poles x by the number of phases k,
The plurality of coils belonging to each system are consecutively arranged in an angular range obtained by dividing 360 degrees by the division number n,
In each system, the coils whose number is obtained by dividing the number of poles x by the number of divisions n and the number of phases k are wound by a series of the conductive wires that are continuous along the circumferential direction,
The number of the plurality of clips is equal to the division number n,
The plurality of clips are fixed to the base portion in the vicinity of the coil located approximately in the middle of a dividing line that divides the plurality of coils,
The winding start lead-out line and the winding end lead-out line are wired so as to thread between the plurality of teeth parts, and the convergence part is located near the position where the plurality of clips are fixed. A rotating electric machine converging at (468).
The base part has a plurality of fixing holes for fixing to a fixed part to be fixed,
The rotating electrical machine according to claim 4, wherein the fixing hole is arranged so as to be approximately line symmetrical with respect to the dividing line.
The phase number k is 3,
The number of divisions n is an even number,
The rotating electric machine according to claim 4 or 5, wherein the plurality of coils belonging to odd-numbered systems and the plurality of coils belonging to even-numbered systems are wound so that their winding directions are opposite to each other. .
Further, it includes a control device (480) that is electrically connected to the plurality of lead wires and controls the input and output power of the plurality of coils to an alternating current with a number of phases k,
6. The control device controls the input/output power of the plurality of coils belonging to odd-numbered systems and the input/output power of the plurality of coils belonging to even-numbered systems to be in opposite phases to each other. The rotating electric machine described in .